<template>
  <view v-if="goods_info.goods_name" class="goods-detail-container">
    <!-- 轮播图区域 -->
    <swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
      <swiper-item v-for="(item, i) in goods_info.pics" :key="i">
        <image :src="item.pics_big" @click="preview(i)"></image>
      </swiper-item>
    </swiper>
    <!-- 商品信息区域 -->
    <view class="goods-info-box">
      <!-- 商品价格 -->
      <view class="price">￥{{goods_info.goods_price}}</view>
      <!-- 商品信息主体区域 -->
      <view class="goods-info-body">
        <!-- 商品名字 -->
        <view class="goods-name">{{goods_info.goods_name}}</view>
        <!-- 收藏区域 -->
        <view class="favi">
          <uni-icons type="star" size="18" color="gray"></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      <!-- 运费 -->
      <view class="yf">快递：免运费</view>
    </view>
    <rich-text :nodes="goods_info.goods_introduce"></rich-text>
    <!-- 商品导航组件 -->
    <view class="goods-nav">
      <uni-goods-nav :fill="true" :options="options" :button-group="buttonGroup" @click="onClick" @buttonClick="buttonClick"></uni-goods-nav>
    </view>
  </view>
</template>

<script>
// 从 vuex 中按需导出 mapState 辅助方法
import { mapState, mapMutations, mapGetters } from 'vuex'
  export default {
     computed: {
       // 调用 mapState 方法，把 m_cart 模块中的 cart 数组映射到当前页面中，作为计算属性来使用
       // ...mapState('模块的名称', ['要映射的数据名称1', '要映射的数据名称2'])
       ...mapState('m_cart', []),
       // ...mapState({ cart:state=>state.m_cart.cart})
       //把 m_cart模块中名称为total的getter映射到当前页面使用
       ...mapGetters('m_cart', ['total']),
     },
     //侦听器
     watch:{
       total:{
        handler(newVal){
         const findResult = this.options.find(x => x.text === '购物车')
         if(findResult){
           findResult.info = newVal
         }
       },
        immediate: true,
       },
     },
    data() {
      return {
        goods_info: {},
        // 左侧按钮组的配置对象
        options:[{
          icon:'shop',
          text:'店铺'
        },{
          icon:'cart',
          text:'购物车',
          info:0
        }],
        //右侧按钮组的配置对象
        buttonGroup:[{
          text: '加入购物车',
          backgroundColor: '#ff0000',
          color: '#fff'
        },{
          text: '立即购买',
          backgroundColor: '#ffa200',
          color: '#fff'
        }]
      }
    },
    onLoad(options) {
      //获取商品id
      const goods_id = options.goods_id
      //调用获取商品数据方法
      this.getGoodsDetail(goods_id)
      // console.log(this.cart)
    },
    methods: {
      //加入购物车的方法
      ...mapMutations('m_cart', ['addToCart']),
      //获取商品详情数据的方法
      async getGoodsDetail(goods_id){
        const {data: res} = await uni.$http.get('/api/public/v1/goods/detail', {goods_id: goods_id})
        if(res.meta.status !== 200) return uni.$showMsg()
        //使用字符串的repalce()方法为img标签添加行内的sytle样式，从而解决底部空白间隙问题，使用正则表达式，g表示全局替换
        res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g, '<img style="display: block;"').replace(/webp/g, 'jpg')
        this.goods_info = res.message
        // console.log(this.goods_info)
      },
      //实现轮播图预览的效果
      preview(i){
        uni.previewImage({
          current: i,
          urls: this.goods_info.pics.map(x => x.pics_big)
        })
      },
      //点击购物车跳转到购物车页面
      onClick(e){
        if(e.content.text === '购物车')
          uni.switchTab({
            url:'/pages/cart/cart'
          })
        // console.log(e)
      },
      // 点击加入购物车事件处理函数
      buttonClick(e){
        if(e.content.text === '加入购物车'){
          const goods = {
            goods_id: this.goods_info.goods_id,
            goods_name: this.goods_info.goods_name,
            goods_price: this.goods_info.goods_price,
            goods_count: 1,
            goods_small_logo: this.goods_info.goods_small_logo,
            goods_state: true
          }
          this.addToCart(goods)
        }
      },
    },
    
  }
</script>

<style lang="scss">
swiper{
  height: 750rpx;
  image{
    height: 100%;
    width: 100%;
  }
}
.goods-info-box{
  padding: 10px;
  padding-right: 0;
  .price{
    color: #c00000;
    font-size: 18px;
    margin: 10px 0;
  }
  .goods-info-body{
    display: flex;
    justify-content: space-between;
    .goods-name{
      font-size: 13px;
      margin-right: 10px;
    }
    .favi{
      width: 120px;
      font-size: 12px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      border-left: 1px solid #efefef;
      color: gray;
    }
  }
  .yf{
    font-size: 12px;
    color: gray;
    margin: 10px 0;
  }
}
.goods-detail-container{
  padding-bottom: 50px;
}
.goods-nav{
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
}

</style>
